One day changeover

Sparkymarc

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What’s up y’all. I am in the process of planning a one day changeover. Right now I have a reefer 425xl and I am upgrading to a 72”x36”x24” 260gal peninsula. I plan on stockpiling water from water changes and cycling 100lbs+ in it. I would love to just set the tank up and be able to take my time but I do not have a lot of room. The new tank needs to be where my 425 is, hence the day changeover. I plan on adding more livestock when I do the changeover and I want to make sure that I take every precaution to avoid any problems. I was going to wait another year but I took in a juvy blonde naso and blue hippo that are growing really fast and I have grown attached. So my plans have been accelerated to accommodate. I would love any advice on what would make this process easier on my fish and any other aspects to avoid any other problems. Also would love to hear from anyone who has done this and there experiences. I haven’t been this stressed in a while. Lol. I love my fish and want to keep them happy. Thanks
 
The 1 day changeover is easy, done it a ‘hundred’ times... but I wouldn’t add new/additional livestock that day. Some extra live rock should not be a problem, but hold off on new livestock.
Are you moving old sand? That needs to be the last thing to move and must be cleaned. Once you disturb the sandbed, I wouldn’t take any more water from that tank
 
The new system with the sump will be about a total of 300 gal. I’m going to store the water from the water changes and cure about 100lbs of rock in it with a power head and heater. I have about 80lbs of rock in my current tank. I plan on adding about 60 to 75 gal of new water and transfer water from current tank and water from curing rock which will be about 225-240gal of cycled water.
 
AS stated above hold off on any new livestock..

I agree with the sandbed issue - depending on the depth of the sand bed. The thicker is it the less I would mess with it. If its a thin (less than 3 inches) would be sure to give it a good rinse in RO water on the way to the new tank but I don't think I would be "as" concerned about it as I would be with a deep sand bed.

Just my opinion. If I am wrong please tell us more. I am eager to learn.
 
The 1 day changeover is easy, done it a ‘hundred’ times... but I wouldn’t add new/additional livestock that day. Some extra live rock should not be a problem, but hold off on new livestock.
Are you moving old sand? That needs to be the last thing to move and must be cleaned. Once you disturb the sandbed, I wouldn’t take any more water from that tank
I do plan on transferring sandbed which i do siphon periodically. I agree that when I disturb the sandbed, whatever water remains will not be transferred
 
The new system with the sump will be about a total of 300 gal. I’m going to store the water from the water changes and cure about 100lbs of rock in it with a power head and heater. I have about 80lbs of rock in my current tank. I plan on adding about 60 to 75 gal of new water and transfer water from current tank and water from curing rock which will be about 225-240gal of cycled water.
Water itself does not contain much of the bacteria that you are after in a cycle. You will be more or less using just dirty and somewhat depleted water. This is great for starting your rock off separately. It won't do much to be helpful in the new system.. Clean water at that point would be far more helpful and easier to monitor.
 
Water itself does not contain much of the bacteria that you are after in a cycle. You will be more or less using just dirty and somewhat depleted water. This is great for starting your rock off separately. It won't do much to be helpful in the new system.. Clean water at that point would be far more helpful and easier to monitor.
I agree. I should mentioned that I will be taking a few pieces of rock out of my current tank to help with the curing process
 
AS stated above hold off on any new livestock..

I agree with the sandbed issue - depending on the depth of the sand bed. The thicker is it the less I would mess with it. If its a thin (less than 3 inches) would be sure to give it a good rinse in RO water on the way to the new tank but I don't think I would be "as" concerned about it as I would be with a deep sand bed.

Just my opinion. If I am wrong please tell us more. I am eager to learn.
My sandbed is about 2” and I siphon here and there. I try not to disturb too much at one time. Also my tank is not quite 2 years old.
 
Storing, moving and heating 260+ gallons of water is a project in itself. Having the new tank in the same spot as existing adds a bit of complexity too, so you are right to have some nervousness.

But I will start with some recommendations:

a) Talk to your LFS or reef club about hiring out somebody for the day that has this kind of experience. Most of us have done changeovers, and they rarely go completely according to plan, but the volume you are working with is going to make mistakes cost a lot of time. Clearly you are going to have some muscle on hand to place a 260G tank, but some more process experience is extremely helpful.

b) Start building a task list (or Gantt chart) in a spreadsheet and revise & reorder it 20 times. Share it here after twenty revisions. We all get to that "point of no turning back". This chart will give you the confidence to start ripping stuff apart and moving quickly.

c) That task list will help you build a materials list of stuff you might need. Extra storage, hoses, pumps, heaters, powerstrips, ShopVac, level, blah blah.

d) What to do with your old sand? Rinse & reuse? You certainly can, but it adds time and also requires space & water. You could do most of this day(s) before tho.

e) If this is FOWLR then things just got easier. If corals are involved this is another vat that needs circulation and heat.

Oh jeez. I could go on forever with this I'm sorry. Get rolling with parts a, b, c and share here. Don't forget to Go-Pro the Big Day for us!
 
the sand rinse thread is 20 pages of pure tank moves, small tanks up to about 200 or so was our biggest one.

these are the key reasons we go for 20 pages without loss and never using one single test kit for ammonia or any additives like prime or bottle bac:

-any transfer of detritus is your sole concern, nothing you do will limit bacteria upon new setup if you use any degree of your current live rock. Even if you reduced your current live rock, and added more fish, thats still not lacking bacteria.
If you choose to rinse your sand so clear it cannot cloud, and swish rocks being moved about in -saltwater- solely so that they eject years of pent up waste (if applicable) before being moved over, then you will not get even a mild recycle as ammonia events in a reef tank are never, ever extended low level amounts (thats test misreads, see what a seneye says for the real deal) true ammonia events are tank wipers where the whole thing crashes over nite. We can avoid that by moving zero detritus.

If you want to move some detritus, for whatever reason, then you begin amassing risk. The sole risk you face is not lack of bac, its detritus clouding casting up ammonia into the water. Lots of people move tanks without being careful of detritus, but zero people manage a 20 page tank move thread while advising others to keep the detritus, or the bugs in the bed etc. The only safe move is a totally clean transfer.

-we are tap rinsers. tap water. Because I stated above nothing you do will cause a low bacteria condition in the new tank, ergo rinsing your bed in tap water, or removing the bed instantly to be bare bottom in the new tank, or blasting the sandbed in an oven at 200 degrees for nine days, all are the same ends. That means you dont have to be careful with your sand regarding how you rinse it, what you rinse it with, as long as no detritus exists after. Swap the bed, remove the bed, rinse it in tap, rinse it in 200 gallons of saltwater matched to every param, does not matter. We use tap so that you have enough to complete the rinse.

# of recycles caused by partial rinsing (i ran out of saltwater/ro) is in the hundreds we've seen before streamlining events like we do in the thread.

Live rock that is already matured is such a powerful scrub for ammonia we can 100% rely on even a reduction of it to handle the transfer, the key is dont overwhelm it with swirling mud rot. The #1 cause of tank transfer loss is people moving dirty systems, or not rinsing well, out of fear of losing bacteria.

You can't do anything in a tank transfer to cause a low bac condition, we show for 20 pages. In fact, its more dangerous to begin a tank move without a detritus cleaning plan even if you have prime and other offsets in place, its that important to clean the surfaces of mud before setting back up
Enjoy
post your work for us man!
 
Last edited:
Storing, moving and heating 260+ gallons of water is a project in itself. Having the new tank in the same spot as existing adds a bit of complexity too, so you are right to have some nervousness.

But I will start with some recommendations:

a) Talk to your LFS or reef club about hiring out somebody for the day that has this kind of experience. Most of us have done changeovers, and they rarely go completely according to plan, but the volume you are working with is going to make mistakes cost a lot of time. Clearly you are going to have some muscle on hand to place a 260G tank, but some more process experience is extremely helpful.

b) Start building a task list (or Gantt chart) in a spreadsheet and revise & reorder it 20 times. Share it here after twenty revisions. We all get to that "point of no turning back". This chart will give you the confidence to start ripping stuff apart and moving quickly.

c) That task list will help you build a materials list of stuff you might need. Extra storage, hoses, pumps, heaters, powerstrips, ShopVac, level, blah blah.

d) What to do with your old sand? Rinse & reuse? You certainly can, but it adds time and also requires space & water. You could do most of this day(s) before tho.

e) If this is FOWLR then things just got easier. If corals are involved this is another vat that needs circulation and heat.

Oh jeez. I could go on forever with this I'm sorry. Get rolling with parts a, b, c and share here. Don't forget to Go-Pro the Big Day for us!
I feel like you just read my mind! Lol. I do have an awesome LFS, who is a good friend, that will be helping. Also, a few other more experienced people that will be lending a hand. I work in commercial/industrial construction, so some heavy lifters will be easy to come by. Lol. I’ve had to make myself take my time, as so not to make any mistakes. I do have a few corals(not much) but my LFS is going to hold for me until I can make sure everything is stable. I’m lucky to have awesome friends. Also, if he needs any electrical work, he knows he can call me. Lol
 
the sand rinse thread is 20 pages of pure tank moves, small tanks up to about 200 or so was our biggest one.

these are the key reasons we go for 20 pages without loss and never using one single test kit for ammonia or any additives like prime or bottle bac:

-any transfer of detritus is your sole concern, nothing you do will limit bacteria upon new setup if you use any degree of your current live rock. Even if you reduced your current live rock, and added more fish, thats still not lacking bacteria.
If you choose to rinse your sand so clear it cannot cloud, and swish rocks being moved about in -saltwater- solely so that they eject years of pent up waste (if applicable) before being moved over, then you will not get even a mild recycle as ammonia events in a reef tank are never, ever extended low level amounts (thats test misreads, see what a seneye says for the real deal) true ammonia events are tank wipers where the whole thing crashes over nite. We can avoid that by moving zero detritus.

If you want to move some detritus, for whatever reason, then you begin amassing risk. The sole risk you face is not lack of bac, its detritus clouding casting up ammonia into the water. Lots of people move tanks without being careful of detritus, but zero people manage a 20 page tank move thread while advising others to keep the detritus, or the bugs in the bed etc. The only safe move is a totally clean transfer.

-we are tap rinsers. tap water. Because I stated above nothing you do will cause a low bacteria condition in the new tank, ergo rinsing your bed in tap water, or removing the bed instantly to be bare bottom in the new tank, or blasting the sandbed in an oven at 200 degrees for nine days, all are the same ends. That means you dont have to be careful with your sand regarding how you rinse it, what you rinse it with, as long as no detritus exists after. Swap the bed, remove the bed, rinse it in tap, rinse it in 200 gallons of saltwater matched to every param, does not matter.

Live rock that is already matured is such a powerful scrub for ammonia we can 100% rely on even a reduction of it to handle the transfer, the key is dont overwhelm it with swirling mud rot. The #1 cause of tank transfer loss is people moving dirty systems, or not rinsing well, out of fear of losing bacteria.

You can't do anything in a tank transfer to cause a low bac condition, we show for 20 pages. In fact, its more dangerous to begin a tank move without a detritus cleaning plan even if you have prime and other offsets in place, its that important to clean the surfaces of mud before setting back up
Enjoy
post your work for us man!
Thanks! I will most definitely give that a read. I’m not set on transferring sand. I do plan on curing at least 100+lbs before the move for sure. Things are about to get moving and I will keep everybody posted!
 
I feel like you just read my mind! Lol. I do have an awesome LFS, who is a good friend, that will be helping. Also, a few other more experienced people that will be lending a hand. I work in commercial/industrial construction, so some heavy lifters will be easy to come by. Lol. I’ve had to make myself take my time, as so not to make any mistakes. I do have a few corals(not much) but my LFS is going to hold for me until I can make sure everything is stable. I’m lucky to have awesome friends. Also, if he needs any electrical work, he knows he can call me. Lol

Glad you have electrics & muscle & experience in da house. I was going to mention electrics but thought I was wordy enough. Personally. I feel like I am stressing two 20 amp dedicated circuits these days and wishing I had that expertise on hand. How can a 30KW generator not be enough? Anyway...

Probabilities suggest mistakes will happen; there are just so many steps to synchronize. I hated documentation in corporate, but love it for this kind of stuff. My suggestion remains to build out the transition plan and run it by a few folks to be picked at. My LFS has steered me around multiple expansions.
 

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